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The different between BSP and NPT thread connection
2013-03-10 21:55:07

TOFINE | www.flow-controls.com,  sales@flow-controls.com

TOFINE motorized ball valves available in BSP or NPT thread connection
,if you are not sure what thread will be suitable for your market,just contact TOFINE (sales@flow-controls.com )and tell us which country you come from?

BSP--British Standard pipe,for European ,Asia,Africa markets,also named BSPP thread connection.

NPT--National Pipe Thread standard, US standard thread connection,National Pipe taper,standard pipe thread in USA,for USA,Canada,South America,etc

NPT threads are common in the United States, BSP threads are widely used in many other countries. As far as our experience,to avoid leak problems,if you are in USA or Canda,you should select NPT thread connection as it is more compatible with USA or Canda pipes .Please rest assured our TOFINE-THA20T and TOFINE-CWX15Q availble in BSP and NPT thread connection,

The difference between these two thread types can be seen in the number of threads per inch and the angle at which the threads themselves are cut.
NPT and BSP thread pitches (threads per inch, TPI) are listed below

1/2"NPT to 1/2"BSP. Both have 14 threads per inch so they match up quite well.The primary difference is in the pitch (angle of the thread) which is 60 to 55. Use a PTFE tape and they screw together and seal OK. 
3/4"NPT works well with 3/4" BSP as well since the threads per inch is the same, 14. 
So, if no strict demand,sometimes you can ignore this slightly difference on low pressure systems as  it is a well safe margin.

Also,what is difference between BSPP and BSPT thread connection?

The British BSP connections include two types of threads,BSPP and BSPT is different,BSPP which are straight (or parallel) and BSPT which are tapered.TOFINE valves BSP thread connection belongs to BSPP.

More details please contact Amy by Email:sales@flow-controls.com, www.flow-controls.com

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